for the sound plugin:
Enable Sound: ON
Enable CDD ON
Enable XA sound: OFF
Enable SPU IRQ: OFF
for video, I have pretty high graphics settings, so it won't help the choppiness
Windowed 1024, 32 bit, keep psx aspect ratio
textures: best colors
hi res textures 2xSal
gfx card autodetect
texture filtering: extended + smoothed sprites
fps: show fps, use fps limit, fps limit 200
compatibility
Off Screen: 3
framebuffer textures: 0
framebuffer access: 0
alpha multi, mask bit, advanced blending
Misc:
Scanlines(25%), color dithering, screen smoothing